Patent trolling is far from a divisive issue in the United States. Pretty much everyone but the trolls can agree that patent trolling is damaging to the economy, and generally kind of a dick move. Patent trolling, if you're not familiar with the practice, is quite simple in concept: buy patents, extort licensing fees from alleged infringers, and sue if they refuse to comply. President Obama proposed some "major" changes to US law that will supposedly reduce the effectiveness of such companies. Before we look at those, though, let's look briefly at what makes a troll tick.
(And no, Apple is not a 'patent troll.' This has basically nothing to do with Apple.